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/* This file is part of the sirit project.
* Copyright (c) 2019 sirit
* This software may be used and distributed according to the terms of the
* 3-Clause BSD License
*/
#include <cassert>
#include "sirit/sirit.h"
#include "common_types.h"
#include "stream.h"
namespace Sirit {
constexpr u32 MakeWord0(spv::Op op, size_t word_count) {
return static_cast<u32>(op) | static_cast<u32>(word_count) << 16;
}
Module::Module(u32 version_)
: version{version_}, ext_inst_imports{std::make_unique<Stream>(&bound)},
entry_points{std::make_unique<Stream>(&bound)},
execution_modes{std::make_unique<Stream>(&bound)}, debug{std::make_unique<Stream>(&bound)},
annotations{std::make_unique<Stream>(&bound)}, declarations{std::make_unique<Declarations>(
&bound)},
global_variables{std::make_unique<Stream>(&bound)}, code{std::make_unique<Stream>(&bound)} {}
Module::~Module() = default;
std::vector<u32> Module::Assemble() const {
std::vector<u32> words = {spv::MagicNumber, version, GENERATOR_MAGIC_NUMBER, bound + 1, 0};
const auto insert = [&words](std::span<const u32> input) {
words.insert(words.end(), input.begin(), input.end());
};
words.reserve(words.size() + capabilities.size() * 2);
for (const spv::Capability capability : capabilities) {
insert(std::array{
MakeWord0(spv::Op::OpCapability, 2),
static_cast<u32>(capability),
});
}
for (const std::string_view extension_name : extensions) {
size_t string_words = WordsInString(extension_name);
words.push_back(MakeWord0(spv::Op::OpExtension, string_words + 1));
size_t insert_index = words.size();
words.resize(words.size() + string_words);
InsertStringView(words, insert_index, extension_name);
}
insert(ext_inst_imports->Words());
insert(std::array{
MakeWord0(spv::Op::OpMemoryModel, 3),
static_cast<u32>(addressing_model),
static_cast<u32>(memory_model),
});
insert(entry_points->Words());
insert(execution_modes->Words());
insert(debug->Words());
insert(annotations->Words());
insert(declarations->Words());
insert(global_variables->Words());
insert(code->Words());
return words;
}
void Module::PatchDeferredPhi(const std::function<Id(std::size_t index)>& func) {
for (const u32 phi_index : deferred_phi_nodes) {
const u32 first_word = code->Value(phi_index);
[[maybe_unused]] const spv::Op op = static_cast<spv::Op>(first_word & 0xffff);
assert(op == spv::Op::OpPhi);
const u32 num_words = first_word >> 16;
const u32 num_args = (num_words - 3) / 2;
u32 cursor = phi_index + 3;
for (u32 arg = 0; arg < num_args; ++arg, cursor += 2) {
code->SetValue(cursor, func(arg).value);
}
}
}
void Module::AddExtension(std::string extension_name) {
extensions.insert(std::move(extension_name));
}
void Module::AddCapability(spv::Capability capability) {
capabilities.insert(capability);
}
void Module::SetMemoryModel(spv::AddressingModel addressing_model_,
spv::MemoryModel memory_model_) {
addressing_model = addressing_model_;
memory_model = memory_model_;
}
void Module::AddEntryPoint(spv::ExecutionModel execution_model, Id entry_point,
std::string_view name, std::span<const Id> interfaces) {
entry_points->Reserve(4 + WordsInString(name) + interfaces.size());
*entry_points << spv::Op::OpEntryPoint << execution_model << entry_point << name << interfaces
<< EndOp{};
}
void Module::AddExecutionMode(Id entry_point, spv::ExecutionMode mode,
std::span<const Literal> literals) {
execution_modes->Reserve(3 + literals.size());
*execution_modes << spv::Op::OpExecutionMode << entry_point << mode << literals << EndOp{};
}
Id Module::AddLabel(Id label) {
assert(label.value != 0);
code->Reserve(2);
*code << MakeWord0(spv::Op::OpLabel, 2) << label.value;
return label;
}
Id Module::AddLocalVariable(Id result_type, spv::StorageClass storage_class,
std::optional<Id> initializer) {
code->Reserve(5);
return *code << OpId{spv::Op::OpVariable, result_type} << storage_class << initializer
<< EndOp{};
}
Id Module::AddGlobalVariable(Id result_type, spv::StorageClass storage_class,
std::optional<Id> initializer) {
global_variables->Reserve(5);
return *global_variables << OpId{spv::Op::OpVariable, result_type} << storage_class
<< initializer << EndOp{};
}
Id Module::GetGLSLstd450() {
if (!glsl_std_450) {
ext_inst_imports->Reserve(3 + 4);
glsl_std_450 = *ext_inst_imports << OpId{spv::Op::OpExtInstImport} << "GLSL.std.450"
<< EndOp{};
}
return *glsl_std_450;
}
} // namespace Sirit
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